Of course it is. Everything on this site is Creative Commons: you can use it for whatever you like, as long as you credit the source. (That's a drastic simplification; read the Licensing Guide for details.) Sticking a handful of skips into your tabletop RPG is absolutely fair use.

As for which ones could work… virtually any of them could be shoehorned in some way or another, and with enough creativity any of them could make a good campaign. Ask "what do you want from an SCP?" before you try to find a skip to fit it.

Dude, 4th addition isn't nearly as good as 3 point 5th.
But if you want something more challenging than a tarrasque, you could try your luck against 682, if you can figure out how to implement him.

Also, look through the list to see what could be magic items (some might just be the "novelty-unless-creative" items)
Sideways falling rock, Schrodinger's Can Opener, just go through the list, and whatever sounds promising, read, and think of how to implement. Also a good procedure for reading through the list regardless, except for the last part.

This implies an objective standard by which you can judge. ;) Personally, I thought 4e was a superior system to 3.5, but that both had pretty fundamental flaws (and it's true that 4e was the least D&D-esque of the two).

I was actually thinking of using SCP-682 in my campaign and it was what got me thinking of using others in the campaign. Haha
for 682 you could make it something that the primordials made but never actually used or perhaps one of the "original people" like in greek mythology when humans had two heads ect. All the other SCPs could be leftovers from that time.

Keep in mind that 682 cannot be killed. It's part of the beast's nature — part of the narrative, out-of-universe point to the article. Tossing it into a D&D campaign, where the point of a monster is usually to kill it, is likely to end either in losing the most interesting thing about the article or in frustrating your players.

I was thinking that a group of npc chronomancers along with other forces recruited from other planes could be used to take down 682 untill it is weak enough to throw it in to an unstable portal leading to the far realm, from the plane of 10,000 portals in the abyss. I doubt that a baby 682 with no learned resistances can live through the far realm. Or we just pull a Tharisdun 2.0 situation and trap it hidden DEEP DEEP DEEP in the abyss in a prison made by the gods and primordials hiding keys in each plane including the far realm. (which i count as a plane of its own)

I thought that maybe SCP-111 would make a great reward for the players or perhaps make them larger so they become steeds.
I cant remember the designation or name of an scp but its the one that is like a huge rubics cube with 100x100 faces and predicts/(causes?) disasters at varying distances and of varying magnitude.it would be a fun puzzle for the group but i would remove the attack by trying to force it.
Also, my group is extremely paranoid in game and things like SCP-104 would be devestating mentally. they would be convinced it was some sort of object posessed by a powerfull demon just waiting for them to drop their guard.

Any more suggestions on scps that could fit in well with d20 fantasy preferably 4E D&D?
im hoping to avoid SCPs like 914. For example 198 goes untill death, but change it up a bit to become a cup that causes endless thirst(which can quickly lead to death from too much liquid or rapid dehydration) unless you fill it up with blood or for something less grim you could have it need to be filled with water from a spring in the same dungeon that you found the item then warmed over a "sacred fire" in that same dungeon. These instructions could be printed in a language that the player does not know but that one of the other players does on the cup or it could be printed on the cups pedestal.

SCP-217, perhaps as an infectious agent from whichever Outer Plane it was that was the Plane of Pure Order? It's been a while since I've looked up D&D spells, but isn't there a "protection from order" similar to "protection from evil"? Imagine if the PCs had to figure out that THAT was how to "cure" the disease, rather than fighting it or casting "cure disease".

Instead of just using a few SCPs in a DND campaign this campaign is starting to be overrun! I've decided to make the campaign centered around BEING the foundation starting with starting the foundation and the whole major point of the campaign will be to capture and kill 682, which will be made easy with some DND lore. I'm thinking of starting with the group being sent out into the woods to find without knowing what it is SCP-173. Then after a small bit of guidance they will make the foundation and the next thing to retrieve will be the "ice fog jar" SCP-244. The heroic tier will probably be centered around getting the hang of the procedure for retrieving the artifacts. Also SCP-217 can be running rampant and how to fix/ protect against it can be the major point of the heroic tier.

Just remember that while it seems like getting rid of SCP-682 would be easy in a D&D fantasy/magic framework, it adapts to survive anything that happens to it. So if they fireball it, it'll grow fireproof skin (equivalent of Protection From Elements +infinity) and that won't work again. If they Baleful Polymorph it, it shakes off the transformation in a few seconds/minutes/hours and is immune to transformation spells from then on. Frankly, the only way to get rid of it is to… get rid of it. Teleport or dimension gate it somewhere far, far away. The Void or one of the Outer Planes or something. Just don't be surprised if it comes back later, pissed as hell.

Thoughts about 173: 173 is immobile so long as it's under direct visual observation. So does scrying work on it? We know that non-human things that see can hold it (both 682 and the Eye Pods have done it), although it's implied that they have to be sentient/sapient. So would using a golem to watch it work?

I would definitely say yes to both scrying and golems as long as the golem can see it should count toward 173. And as for the other plane idea that sounds like a great idea, but i also seem to remember reading a bit of lore somewhere that there is this HUGE primordial mega beast that comes out of the ground once every thousand or so years and is completely impossible to kill. You can lower its health to zero but you cannot finish it off. it simply retreats back into the ground for thousands of years. I could see summoning that thing and feeding a weakened 682 to it to see which one wins. the loser will have to either die or be trapped for good. It has been a while since i have read up on the primordials and things related to them so i may be off, or it may be from dragon magazine. I think it may be Dendur, but feeding 682 to the immortal creature would at least be interesting if not useful. Ha ha